from __future__ import absolute_import from operator import attrgetter from django.db import connection from django.test import TestCase, skipIfDBFeature, skipUnlessDBFeature from django.test.utils import override_settings from .models import Country, Restaurant, Pizzeria, State, TwoFields class BulkCreateTests(TestCase): def setUp(self): self.data = [ Country(name="United States of America", iso_two_letter="US"), Country(name="The Netherlands", iso_two_letter="NL"), Country(name="Germany", iso_two_letter="DE"), Country(name="Czech Republic", iso_two_letter="CZ") ] def test_simple(self): created = Country.objects.bulk_create(self.data) self.assertEqual(len(created), 4) self.assertQuerysetEqual(Country.objects.order_by("-name"), [ "United States of America", "The Netherlands", "Germany", "Czech Republic" ], attrgetter("name")) created = Country.objects.bulk_create([]) self.assertEqual(created, []) self.assertEqual(Country.objects.count(), 4) @skipUnlessDBFeature('has_bulk_insert') def test_efficiency(self): with self.assertNumQueries(1): Country.objects.bulk_create(self.data) def test_inheritance(self): Restaurant.objects.bulk_create([ Restaurant(name="Nicholas's") ]) self.assertQuerysetEqual(Restaurant.objects.all(), [ "Nicholas's", ], attrgetter("name")) with self.assertRaises(ValueError): Pizzeria.objects.bulk_create([ Pizzeria(name="The Art of Pizza") ]) self.assertQuerysetEqual(Pizzeria.objects.all(), []) self.assertQuerysetEqual(Restaurant.objects.all(), [ "Nicholas's", ], attrgetter("name")) def test_non_auto_increment_pk(self): State.objects.bulk_create([ State(two_letter_code=s) for s in ["IL", "NY", "CA", "ME"] ]) self.assertQuerysetEqual(State.objects.order_by("two_letter_code"), [ "CA", "IL", "ME", "NY", ], attrgetter("two_letter_code")) @skipUnlessDBFeature('has_bulk_insert') def test_non_auto_increment_pk_efficiency(self): with self.assertNumQueries(1): State.objects.bulk_create([ State(two_letter_code=s) for s in ["IL", "NY", "CA", "ME"] ]) self.assertQuerysetEqual(State.objects.order_by("two_letter_code"), [ "CA", "IL", "ME", "NY", ], attrgetter("two_letter_code")) @skipIfDBFeature('allows_primary_key_0') def test_zero_as_autoval(self): """ Zero as id for AutoField should raise exception in MySQL, because MySQL does not allow zero for automatic primary key. """ valid_country = Country(name='Germany', iso_two_letter='DE') invalid_country = Country(id=0, name='Poland', iso_two_letter='PL') with self.assertRaises(ValueError): Country.objects.bulk_create([valid_country, invalid_country]) def test_batch_same_vals(self): # Sqlite had a problem where all the same-valued models were # collapsed to one insert. Restaurant.objects.bulk_create([ Restaurant(name='foo') for i in range(0, 2) ]) self.assertEqual(Restaurant.objects.count(), 2) def test_large_batch(self): with override_settings(DEBUG=True): connection.queries = [] TwoFields.objects.bulk_create([ TwoFields(f1=i, f2=i+1) for i in range(0, 1001) ]) self.assertEqual(TwoFields.objects.count(), 1001) self.assertEqual( TwoFields.objects.filter(f1__gte=450, f1__lte=550).count(), 101) self.assertEqual(TwoFields.objects.filter(f2__gte=901).count(), 101) @skipUnlessDBFeature('has_bulk_insert') def test_large_single_field_batch(self): # SQLite had a problem with more than 500 UNIONed selects in single # query. Restaurant.objects.bulk_create([ Restaurant() for i in range(0, 501) ]) @skipUnlessDBFeature('has_bulk_insert') def test_large_batch_efficiency(self): with override_settings(DEBUG=True): connection.queries = [] TwoFields.objects.bulk_create([ TwoFields(f1=i, f2=i+1) for i in range(0, 1001) ]) self.assertTrue(len(connection.queries) < 10) def test_large_batch_mixed(self): """ Test inserting a large batch with objects having primary key set mixed together with objects without PK set. """ with override_settings(DEBUG=True): connection.queries = [] TwoFields.objects.bulk_create([ TwoFields(id=i if i % 2 == 0 else None, f1=i, f2=i+1) for i in range(100000, 101000)]) self.assertEqual(TwoFields.objects.count(), 1000) # We can't assume much about the ID's created, except that the above # created IDs must exist. id_range = range(100000, 101000, 2) self.assertEqual(TwoFields.objects.filter(id__in=id_range).count(), 500) self.assertEqual(TwoFields.objects.exclude(id__in=id_range).count(), 500) @skipUnlessDBFeature('has_bulk_insert') def test_large_batch_mixed_efficiency(self): """ Test inserting a large batch with objects having primary key set mixed together with objects without PK set. """ with override_settings(DEBUG=True): connection.queries = [] TwoFields.objects.bulk_create([ TwoFields(id=i if i % 2 == 0 else None, f1=i, f2=i+1) for i in range(100000, 101000)]) self.assertTrue(len(connection.queries) < 10) def test_explicit_batch_size(self): objs = [TwoFields(f1=i, f2=i) for i in range(0, 4)] TwoFields.objects.bulk_create(objs, 2) self.assertEqual(TwoFields.objects.count(), len(objs)) TwoFields.objects.all().delete() TwoFields.objects.bulk_create(objs, len(objs)) self.assertEqual(TwoFields.objects.count(), len(objs)) @skipUnlessDBFeature('has_bulk_insert') def test_explicit_batch_size_efficiency(self): objs = [TwoFields(f1=i, f2=i) for i in range(0, 100)] with self.assertNumQueries(2): TwoFields.objects.bulk_create(objs, 50) TwoFields.objects.all().delete() with self.assertNumQueries(1): TwoFields.objects.bulk_create(objs, len(objs))